(Roughly) Daily

Posts Tagged ‘Leonardo

“In the long run we are all dead”*…



Here Is Today


Put it all in (temporal) perspective at “Here Is Today.”

* John Maynard Keynes


As we ponder the perception of permanence, we might send polymathic birthday greetings to someone who has so far transcended time– the painter, sculptor, architect, musician, mathematician, engineer, inventor, physicist, chemist, anatomist, botanist, geologist, cartographer, and writer– the archetypical Renaissance Man– Leonardo da Vinci.  Quite possibly the greatest genius of the last Millennium, he was born on this date in 1452.

Self-portrait in red chalk, circa 1512-15 [source]

Written by LW

April 15, 2019 at 1:01 am

A Matter of Some Gravity…


I’ve been noticing gravity since I was very young.
-Cameron Diaz

Isaac Newton first proposed a universal law of gravitation, where every massive body in the universe was attracted to every other one. This simple law proved extremely powerful, able to explain the orbits of planets and the reason the apocryphal apple fell on his head. However, Newton was never able to explain why gravity worked or what exactly it was. Two hundred plus years later, Albert Einstein was able to offer a more complete description of gravity—one where Newton’s laws are a limited case. According to Einstein, gravity was due to the warpage of spacetime by mass and energy; all objects followed straight paths, just on curved spaces.

With the advent of quantum theory over the past 100 years, scientists have been able to develop an elegant mathematical framework capable of uniting three of the four fundamental forces that are thought to exist in the universe. The fourth, gravity, still remains the fly in the ointment, and has resisted unification to this point. Early last year, Dutch theoretical physicist Erik Verlinde published a manuscript to the arXiv that purports to explain why science cannot reconcile all four fundamental forces. According to him, it is simple: “gravity doesn’t exist.”

Read the full story (SPOILER ALERT: it relates to Leonard Susskind‘s “holographic principle,” suggesting in effect that gravity isn’t a fundamental force, but an “entropic” result of information imbalances between the bodies/regions in question) in Ars Technica (recapping Physical Review D, 2011. DOI: 10.1103/PhysRevD.83.021502).

As we sit more confidently beneath apple trees, we might wish a polymathic Happy Birthday to the painter, sculptor, architect, musician, scientist, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist and writer– the archetypical Renaissance Man– Leonardo da Vinci; he was born on this date in 1452.

Self-portrait in Red Chalk (source)

I for one welcome our new computer overlords…


In the aftermath of Watson’s triumph over humanity’s best, your correspondent thought it wise to remind readers (and himself) that this is not the first time that we mortals have faced the onslaught of astounding new technology.

The good folks at Dark Roasted Blend have compiled a nifty through-the-ages recap of attempts to create “life” in new-fangled ways; from Leonardo’s “robot” and John Dee’s “flying beetle” to an “steam-powered hiker” and an “electric milk man” from Victorian England, there’s quite a selection in “Amazing Automatons: Ancient Robots & Victorian Androids.”

It’s all fascinating; but the sweet spot is surely the selection of creations from the 18th (and early 19th) centuries, when the then-highly-developed crafts of metal working and watchmaking were turned to automata.  Consider, for example…

Jacques Vaucason created numerous working figures, including a flute player, which actually played the instrument, in 1738, plus this duck from 1739. The gilded copper bird could sit, stand, splash around in water, quack and even give the impression of eating food and digesting it.

Pierre Jaquet-Doz created three automata, The Writer, The Draughtsman and The Musician, which are still considered scientific marvels today. The Draughtsman is capable of producing four distinct pictures, while the Writer dips his pen in the ink and can write as many as forty letters. The Musician’s fingers actually play the organ and the figure ends her performance with a bow.

More, at Dark Roasted Blend.

As we remind ourselves to re-read Kevin Kelly’s excellent What Technology Wants and then to retake the Turing Test, we might stage a dramatic memorial dramatist and scenic innovator James Morrison Steele (“Steele”) MacKaye; he died on this date in 1894.  He opened the Madison Square Theatre in 1879, where he created a huge elevator with two stages stacked one on top of the other so that elaborate furnishings could be changed quickly between scenes. MacKaye was the first to light a New York theatre– the Lyceum, which he founded in 1884– entirely by electricity. And he invented and installed overhead and indirect stage lighting, movable stage wagons, artificial ventilation, the disappearing orchestra pit, and folding seats. In all, MacKaye patented over a hundred inventions, mostly for the improvement of theatrical production and its experience.

Steele MacKaye

%d bloggers like this: